Brother LC71 3-Pack Innobella Standard Yield Ink Cartridges - Retail Packaging - Cyan/Yellow/Magenta Cyan Ink, Magenata Ink, & Yellow Ink, Standard Yield Approx. 300 page yield per cartridge (in accordance with ISO/IEC 24711). OEM Genuine Brother Ink This particular consumable series (LC71, LC75 and LC79) do not have a spring in them. Older series such as the LC61 series do have a spring in them so the front cover could move back when installed into the machine. (MFCJ5910DW, MFCJ6510DW, MFCJ6710DW, MFCJ6910DW) takes LC75 and LC79 series inks. LC71 series ink wont fit in model number (MFCJ5910DW, MFCJ6510DW, MFCJ6710DW, MFCJ6910DW) as the cartridge will not lock in place and just spring back.